Porosity Enhancement of Silicon Carbide by Preparation in Micro-Mesoporous Zeolite-Like Matrices

Heat treatment of carbon–silica composites derived from micro-mesoporous zeolite-like materials yields the β-modification of silicon carbide with adsorption characteristics much superior to those of analogs obtained using large-porous silica exotemplates (meso-cellular foams). The presence of a large volume of relatively homogeneous mesopores, which permits us to achieve a close-to-stoichiometric C/SiO2 ratio, accounts for the formation of silica carbide with well-developed porosity.